View Code of Problem 24

#include <stdio.h>
#include <math.h>

int main(){
	int a,b,c;
	while(scanf("%d %d %d",&a,&b,&c)!=EOF){
		float p = (float)(a+b+c)/2.0;
		float s = sqrt(p*(p-a)*(p-b)*(p-c));
		printf("%.2f\n",s);
	}
}